Use restoreKeys with cache

To match the recommendation documented here:
https://github.com/actions/cache/blob/main/examples.md#go---modules

Without `restoreKeys` any change to `go.sum` results in a complete cache
miss. By using `restoreKeys` a change in one dependency should still
allow a cache to be restored, so that all the other dependencies are
retreived from the cache.

dist/setup/index.js

@@ -61274,8 +61274,9 @@ exports.restoreCache = (packageManager, cacheDependencyPath) => __awaiter(void 0
     }
     const primaryKey = `setup-go-${platform}-go-${versionSpec}-${fileHash}`;
     core.debug(`primary key is ${primaryKey}`);
+    const restoreKeys = [`setup-go-${platform}-go-${versionSpec}-`];
     core.saveState(constants_1.State.CachePrimaryKey, primaryKey);
-    const cacheKey = yield cache.restoreCache(cachePaths, primaryKey);
+    const cacheKey = yield cache.restoreCache(cachePaths, primaryKey, restoreKeys);
     core.setOutput(constants_1.Outputs.CacheHit, Boolean(cacheKey));
     if (!cacheKey) {
         core.info(`Cache is not found`);

src/cache-restore.ts

@@ -31,10 +31,15 @@ export const restoreCache = async (
 
   const primaryKey = `setup-go-${platform}-go-${versionSpec}-${fileHash}`;
   core.debug(`primary key is ${primaryKey}`);
+  const restoreKeys = [`setup-go-${platform}-go-${versionSpec}-`];
 
   core.saveState(State.CachePrimaryKey, primaryKey);
 
-  const cacheKey = await cache.restoreCache(cachePaths, primaryKey);
+  const cacheKey = await cache.restoreCache(
+    cachePaths,
+    primaryKey,
+    restoreKeys
+  );
   core.setOutput(Outputs.CacheHit, Boolean(cacheKey));
 
   if (!cacheKey) {